People often ask, “Do I have tuberculosis?” In fact, it is difficult to determine the answer to this question based on a single symptom. The clinical manifestations of tuberculosis are mostly nonspecific, and some are asymptomatic or mildly symptomatic. Therefore, the final diagnosis of tuberculosis can only be made through history taking, physical examination, laboratory tests, tuberculin tests, chest X-ray and other special tests such as fiberoptic bronchoscopy and lung biopsy. However, for individuals, whether they have TB or not can be initially determined based on some simple symptoms and signs. The main manifestations of tuberculosis include fever, especially low fever in the afternoon, and may be accompanied by lethargy, fatigue, depression, night sweats, lethargy, flushing, and menstrual irregularities in women. The respiratory system mainly manifests coughing, coughing sputum and hemoptysis. In a few women, irregular menstruation, amenorrhea and infertility are the first symptoms. From the above symptoms and signs, TB does not seem to have any special manifestations, so how can it be diagnosed? Generally speaking, if someone has the above symptoms, especially, persistent low fever for more than 2 weeks with unknown cause, TB should be considered as a possibility, or coughing and sputum for more than 2 weeks, especially with hemoptysis, TB should be highly suspected as a possibility. At this time, it is necessary to go to the hospital to do tuberculin test, chest X-ray and other tests to exclude tuberculosis.